Water way compression | Branch ration | Total length of water way (km) | Branch number grade 3 | Branch number grade 2 | Branch number grade 1 | Circumference (km) | Space (km) | Subzones |
0.616 | 3 | 151.7 | 1 | 1 | 7 | 90.5 | 246 | 1 |
0.625 | 3 | 89.5 | 1 | 2 | 9 | 77 | 143 | 2 |
0.576 | 1 | 116.5 | 1 | 2 | 8 | 98.5 | 202 | 3 |
0.538 | 1 | 108.3 | - | 2 | 4 | 90.6 | 201 | 4 |